Your mind is a sanctuary. Without discipline, how can you rule your mind?
Your body is a temple. Without discipline, the home to your spirit and soul would be in disarray.
If you cannot rule your mind or your body, how can you expect to be a good ruler of anything else? Stewardship begins with controlling the things that are in your control. Start with the body and mind. Be a good steward in these two regards, and who knows how far your rule will one day extend.
If a man does not discipline himself, he cannot bring order to his home. -Confucius